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From John Smith <java.dev....@gmail.com>
Subject Re: Getting java.lang.BootstrapMethodError: java.lang.NoClassDefFoundError when stopping/canceling job.
Date Thu, 16 May 2019 16:38:44 GMT
Hi, so Thread.Sleep(1000) seems to do the trick. Now is this a good thing
or bad thing?

On Thu, 16 May 2019 at 11:46, John Smith <java.dev.mtl@gmail.com> wrote:

> Yes when I mean cancel the JOB, it's when you go inside the UI and hit the
> cancel button at the top right corner.
>
> The close is very simple...
>
> @Override
> public void close() throws Exception {
>    if(jdbc != null)
>       jdbc.close();
>
>    if(vertx != null)
>       vertx.close();
>
>    if(ignite != null)
>       ignite.close();
> }
>
> I was thinking that jdbc.close() and vertx.close() are actually async
> underneath. The vertx APIs offers 2 methods for close, one which has async
> interface and one that does not. But essentially they are both async.
>
> So I'm thinking maybe I can introduce a small Thread.Sleep(1000) after the
> last close to give a chance for vertx.close().
>
>
>
>
> On Thu, 16 May 2019 at 04:14, Andrey Zagrebin <andrey@ververica.com>
> wrote:
>
>> Could you share the source code of your RichAsyncFunction?
>> Looks like netty threads of vertx are still being shutdown after user
>> code class loader has been shutdown.
>> It probably means that RichAsyncFunction was not closed properly or not
>> all resources have been fully freed there (logging your
>> RichAsyncFunction.close could help).
>> Do you mean cancelation by stopping the job?
>>
>> On Wed, May 15, 2019 at 10:02 PM John Smith <java.dev.mtl@gmail.com>
>> wrote:
>>
>>> So these are the two exceptions I see in the logs...
>>>
>>> Exception in thread "vert.x-worker-thread-0" Exception in thread
>>> "vert.x-internal-blocking-0" java.lang.NoClassDefFoundError:
>>> io/netty/util/concurrent/FastThreadLocal
>>> at
>>> io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:32)
>>> at java.lang.Thread.run(Thread.java:748)
>>> Caused by: java.lang.ClassNotFoundException:
>>> io.netty.util.concurrent.FastThreadLocal
>>> at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
>>> at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
>>> at
>>> org.apache.flink.runtime.execution.librarycache.FlinkUserCodeClassLoaders$ChildFirstClassLoader.loadClass(FlinkUserCodeClassLoaders.java:129)
>>> at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
>>> ... 2 more
>>> java.lang.NoClassDefFoundError: io/netty/util/concurrent/FastThreadLocal
>>> at
>>> io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:32)
>>> at java.lang.Thread.run(Thread.java:748)
>>> May 15, 2019 10:42:07 AM io.vertx.core.impl.ContextImpl
>>> SEVERE: Unhandled exception
>>> java.lang.BootstrapMethodError: java.lang.NoClassDefFoundError:
>>> io/vertx/core/impl/VertxImpl$SharedWorkerPool
>>> at
>>> io.vertx.core.impl.VertxImpl.lambda$deleteCacheDirAndShutdown$25(VertxImpl.java:830)
>>> at io.vertx.core.impl.ContextImpl.lambda$null$0(ContextImpl.java:284)
>>> at io.vertx.core.impl.ContextImpl.executeTask(ContextImpl.java:320)
>>> at
>>> io.vertx.core.impl.EventLoopContext.lambda$executeAsync$0(EventLoopContext.java:38)
>>> at
>>> io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163)
>>> at
>>> io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:404)
>>> at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:462)
>>> at
>>> io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:897)
>>> at
>>> io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
>>> at java.lang.Thread.run(Thread.java:748)
>>> Caused by: java.lang.NoClassDefFoundError:
>>> io/vertx/core/impl/VertxImpl$SharedWorkerPool
>>> ... 10 more
>>> Caused by: java.lang.ClassNotFoundException:
>>> io.vertx.core.impl.VertxImpl$SharedWorkerPool
>>> at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
>>> at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
>>> at
>>> org.apache.flink.runtime.execution.librarycache.FlinkUserCodeClassLoaders$ChildFirstClassLoader.loadClass(FlinkUserCodeClassLoaders.java:129)
>>> at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
>>> ... 10 more
>>>
>>> On Wed, 15 May 2019 at 12:00, Andrey Zagrebin <andrey@ververica.com>
>>> wrote:
>>>
>>>> Hi John,
>>>>
>>>> could you share the full stack trace or better logs?
>>>> It looks like something is trying to be executed in vertx.io code
>>>> after the local task has been stopped and the class loader for the user
>>>> code has been unloaded. Maybe from some daemon thread pool.
>>>>
>>>> Best,
>>>> Andrey
>>>>
>>>>
>>>> On Wed, May 15, 2019 at 4:58 PM John Smith <java.dev.mtl@gmail.com>
>>>> wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>> I'm using vertx.io as an async JDBC client for a RichAsyncFunction it
>>>>> works fine but when I stop the job I get...
>>>>>
>>>>> java.lang.BootstrapMethodError: java.lang.NoClassDefFoundError:
>>>>> io/vertx/core/impl/VertxImpl$SharedWorkerPool
>>>>>
>>>>> Is there a way to avoid/fix this?
>>>>>
>>>>

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